From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Graph and calculations comparing traction requirements for front-wheel and rear-wheel drive vehicles under acceleration.
| Identifier | ExFiles\Box 170\3\ img170 | |
| Date | 4th March 1938 guessed | |
| TRACTION .4 .3 .2 .1 ACCELERATION 0 .1 .2 .3 .4 .5 .6 g.{Mr Griffiths - Chief Accountant / Mr Gnapp} [Diagram of a car with forces and dimensions labelled] Labels in diagram: W, Wa{Mr Wallis}, Wb{Mr Brazier/Mr Bell}, h, l, a, b, = (W/g)a Traction Coeff Required FRONT DRIVE = a / (f - ah/l) REAR DRIVE = a / (f + ah/l) Assumed a/f = .5, h/l = .22 | ||